摘要
合金元素的固溶与析出改变了镁基体相电位和第二相的种类,从而显著影响镁合金的微电偶腐蚀行为。本文综述了元素固溶与析出对镁合金耐蚀性影响的研究现状,总结了典型合金元素在镁合金中固溶析出的典型第二相,重点阐述了基于热力学和动力学分析常见镁合金系中的固溶和析出行为对镁合金的腐蚀行为的影响,指出了良好的镁合金候选材料应具备的条件,提出了提高镁合金本征耐蚀性的设计方法,未来研究重点应通过调控镁合金中合金元素的种类和数量来降低镁合金腐蚀速率,扩大合金应用范围。
The solid solution and precipitations of alloying elements can change the chemical potential of the primary phase and the species of the second phase,which can significantly affect the micro-galvanic corrosion behaviors of magnesium alloys.The influence of solid solution and precipitation on corrosion resistance of magnesium alloys was reviewed.Based on the thermodynamics and dynamics analysis,the effect of solution and precipitation behavior on corrosion behavior of common magnesium alloys was summarized.The necessary conditions for a good candidate material of magnesium alloy were pointed out,and the design method for improving the intrinsic corrosion resistance of magnesium alloy was proposed.Future research should focus on reducing the corrosion rate of magnesium alloys and expanding the application range of magnesium alloys by regulating the types and quantities of alloying elements in magnesium alloys.
作者
蒋诗语
袁媛
陈涛
谷达冲
JIANG Shi-yu;YUAN Yuan;CHEN Tao;GU Da-chong(School of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2021年第12期40-47,共8页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51971044,U1910213)
重庆市自然科学基金资助项目(cstc2019yszx-jcyjX0004)
中央高校基本科研业务费专项资金资助项目(2020CDJDPT001)。
关键词
镁合金
固溶
第二相
耐蚀性
Mg alloy
solid solution
second phase
corrosion resistance
